Truss - Staggered Web Members

[slickdeals]

See attached photo from this month's MSC magazine.

http://modernsteel.com/Uploads/Issues/July_2012/072012_sorting.pdf

AISC recommends that the single angle web members not be staggered as it results in a torque in the chords. However, that is clearly what appears to be done in this particular truss. The only reason I can think of that detail being used it to avoid interference between the two angles when meeting at the workpoint and avoid adding a tee stem extension.

Thoughts/Comments?

 

[paddingtongreen]

Don't do as I do, do as I tell you!

Michael.
Timing has a lot to do with the outcome of a rain dance.

 

[BAretired]

The chords appear to be single angles with horizontal legs pointing in opposite directions, so the offset of the web members would not be far from the shear center of the chords.

Pretty unusual truss, all the same.

BA

 

[SteelPE]

While I didn't read the whole article, I couldn't find what facility this actually is. I am familiar with the area.... and I hope this isn't the USPS sort facility that was on the list to be closed with the cuts to the USPS budget. If it is.... our tax dollars hard at work!!!!!!

 

[BAretired]

Looks like my eyes were playing tricks on me. The article claims they used WT chords and double angle web members. That would be pretty normal. That first pic doesn't look like that to me.

BA

 

[slickdeals]

The picture looks like WT chords and single angle web members. Don't see where in the article they say double angle web members.